 While most of Harm's powers come from the sacrifice of his sister to the demon Buzz, he clearly possessed a great capacity for evil before this deal was made, as he is known to have attacked his father and left a serious scar that was a mere inch from his father's jugular when he was only eleven.Part of his 'blessings' include a degree of enhanced strength, allowing him to easily engage Wonder Girl in battle, and enhanced reflexes to the point that he caught Arrowette's arrow in mid-air and then threw it back at her so fast it pierced right through her shoulder; although he admits that he is not on Superboy's level in a purely physical confrontation, he also possesses sufficient combat skills to consider himself the equal of Robin.He claims to have always had a special relationship with machinery, and is able to sneak directly into Young Justice headquarters at Happy Harbor- which was once the Justice League's official HQ- and reprogram the Red Tornado while planting a bomb inside him without tripping the security systems.